使用GD API将大文件上传到Google云端硬盘 [英] Upload large files to Google Drive using GD API

问题描述

我想使用适用于Android的新Drive API以编程方式将大文件上传到Google Drive。您能否给我建议一个带有最佳实践的教程？

我读过这篇 post on stack overflow ，但是他们在那里使用缓冲区加载整个内存。

解决方案

我一直在使用 Google快速入门作为起点。它显示了如何上传Bitmap，但很容易适应。他们还将整个事情保存在一个字节数组中，并将其写入Google Drive的输出流。如果你不想这样做，那么我会建议做这样的事情：

  / ** 
 *创建一个新文件并将其保存到云端硬盘。 
 * / 
 private void saveFileToDrive（final File file）{
 //开始创建一个新内容并设置回调。 
 Log.i（标签，创建新内容）; 
 Drive.DriveApi.newDriveContents（mGoogleApiClient）
 .setResultCallback（新的ResultCallback< DriveApi.DriveContentsResult>（）{
 
 @Override 
 public void onResult（DriveApi.DriveContentsResult结果）{
 //如果操作失败，我们不能做任何事情
 //并且必须
 //失败
 if（！result.getStatus（）。isSuccess （））{
 Log.i（TAG，无法创建新内容）; 
 return; 
} 
 //否则，我们可以将数据写入新内容
 Log.i（TAG，New contents created。）; 
 //获取内容的输出流
 OutputStream outputStream = result.getDriveContents（）。getOutputStream（ ） ; 
 //从中写入位图数据。 
尝试{
 FileInputStream fileInputStream = new FileInputStream（file）; 
 byte [] buffer = new byte [1024]; 
 int bytesRead; 
 while（（bytesRead = fileInputStream.read（buffer））！= -1）
 {
 outputStream.write（buffer，0，bytesRead）; 
 
} catch（IOException e1）{
 Log.i（TAG，Unable to write file contents。）; 
} 
 //创建初始元数据 -  MIME类型和标题。 
 //请注意，用户稍后可以更改标题。 
 MetadataChangeSet metadataChangeSet = new MetadataChangeSet.Builder（）
 .setTitle（file.getName（））。build（）; 
 //为文件选择器创建一个意图，并启动它。 
 IntentSender intentSender = Drive.DriveApi 
 .newCreateFileActivityBuilder（）
 .setInitialMetadata（metadataChangeSet）
 .setInitialDriveContents（result.getDriveContents（））
 .build（mGoogleApiClient）; 
尝试{
 startIntentSenderForResult（
 intentSender，REQUEST_CODE_CREATOR，null，0，0，0）; 
} catch（IntentSender.SendIntentException e）{
 Log.i（TAG，Failed to launch file chooser。）; 
} 
} 
}）; 
} 
  

通过快速入门的设置，您可以使用此方法上传文件。

I want to upload large files to Google Drive programmatically using the new Drive API for android. Could you please suggest me a tutorial with best practices for this?

I was reading this post on stack overflow but there they load the whole in memory, using a buffer.

解决方案

I've been using this quick start from Google as a starting point. It shows how to upload a Bitmap but it's easy to adapt. They also do save the whole thing in a byte array and write it to the output stream for Google Drive. If you don't want to do this then I would recommend doing something like this instead:

     /**
     * Create a new file and save it to Drive.
     */
    private void saveFileToDrive(final File file) {
        // Start by creating a new contents, and setting a callback.
        Log.i(TAG, "Creating new contents.");
        Drive.DriveApi.newDriveContents(mGoogleApiClient)
                .setResultCallback(new ResultCallback<DriveApi.DriveContentsResult>() {

                    @Override
                    public void onResult(DriveApi.DriveContentsResult result) {
                        // If the operation was not successful, we cannot do anything
                        // and must
                        // fail.
                        if (!result.getStatus().isSuccess()) {
                            Log.i(TAG, "Failed to create new contents.");
                            return;
                        }
                        // Otherwise, we can write our data to the new contents.
                        Log.i(TAG, "New contents created.");
                        // Get an output stream for the contents.
                        OutputStream outputStream = result.getDriveContents().getOutputStream();
                        // Write the bitmap data from it.
                        try {
                            FileInputStream fileInputStream = new FileInputStream(file);
                            byte[] buffer = new byte[1024];
                            int bytesRead;
                            while ((bytesRead = fileInputStream.read(buffer)) != -1)
                            {
                                outputStream.write(buffer, 0, bytesRead);
                            }
                        } catch (IOException e1) {
                            Log.i(TAG, "Unable to write file contents.");
                        }
                        // Create the initial metadata - MIME type and title.
                        // Note that the user will be able to change the title later.
                        MetadataChangeSet metadataChangeSet = new MetadataChangeSet.Builder()
                                .setTitle(file.getName()).build();
                        // Create an intent for the file chooser, and start it.
                        IntentSender intentSender = Drive.DriveApi
                                .newCreateFileActivityBuilder()
                                .setInitialMetadata(metadataChangeSet)
                                .setInitialDriveContents(result.getDriveContents())
                                .build(mGoogleApiClient);
                        try {
                            startIntentSenderForResult(
                                    intentSender, REQUEST_CODE_CREATOR, null, 0, 0, 0);
                        } catch (IntentSender.SendIntentException e) {
                            Log.i(TAG, "Failed to launch file chooser.");
                        }
                    }
                });
    }

With the setup from the quickstart you could use this method to upload your file.

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